Answer: Hypersensitivity reaction is a condition in which the normally protective immune system has a harmful effect on the body. It involves harmful immune response following sensitization and subsequent antigen contact. Type IV such as contact dermatitis reactions are delayed and cell-mediated and are the only hypersensitivity reaction that involves sensitized T lymphocytes rather than antibodies.
 
        
             
        
        
        
Answer: D)
Explanation:
The correct answer is enforcing mandatory infectious disease training in hospitals because in that way others can help anyone that is having problems with infections or disease but they will need enough practice for that.
C is an incorrect answer because they are doing training in hospital on how to treat it, with overseeing they would not be so helpful to others.
B is an incorrect answer because even though that something is safe some people can have allergic reactions or some other disease.
 
        
                    
             
        
        
        
Answer:
Because the more you eat the more you have in your stomach and maybe they don't do excrise to get rid of the fat Iniside so that is why and if you want to know why some people don't get fat it might just be they have fast immune sytem so the acid burns the food quicker
Explanation:
 
        
             
        
        
        
Hihi!
The correct answer would be that Diarrheal Diseases - Food Washing, Hepatitis - Avoidance of IV Drugs, and Mumps - Vaccination! If you need anymore help be sure to ask!
I hope I helped!
-Loliarual